. . . . "scientific article published on 01 July 1973"@en . . "Etiology of prolongation of the P-R interval in patients with an endocardial cushion defect. Further observations on internodal conduction and the polarity of the retrograde P wave"@en . . . "art\u00EDculu cient\u00EDficu espubliz\u00E1u en xunetu de 1973"@ast . "4781238" . "Etiology of prolongation of the P-R interval in patients with an endocardial cushion defect. Further observations on internodal conduction and the polarity of the retrograde P wave"@nl . "48" . "Etiology of prolongation of the P-R interval in patients with an endocardial cushion defect. Further observations on internodal conduction and the polarity of the retrograde P wave"@en . . "10.1161/01.CIR.48.1.19" . . . "1973-07-01T00:00:00Z"^^ . "1" . "Etiology of prolongation of the P-R interval in patients with an endocardial cushion defect. Further observations on internodal conduction and the polarity of the retrograde P wave"@en . "Etiology of prolongation of the P-R interval in patients with an endocardial cushion defect. Further observations on internodal conduction and the polarity of the retrograde P wave"@nl . . . "19-26" . . "A L Waldo" . . . "im Juli 1973 ver\u00F6ffentlichter wissenschaftlicher Artikel"@de . "J R Malm" . . . . . "F O Bowman" . "G A Kaiser" . "Etiology of prolongation of the P-R interval in patients with an endocardial cushion defect. Further observations on internodal conduction and the polarity of the retrograde P wave"@en . "\u043D\u0430\u0443\u043A\u043E\u0432\u0430 \u0441\u0442\u0430\u0442\u0442\u044F, \u043E\u043F\u0443\u0431\u043B\u0456\u043A\u043E\u0432\u0430\u043D\u0430 \u0432 \u043B\u0438\u043F\u043D\u0456 1973"@uk . . "Etiology of prolongation of the P-R interval in patients with an endocardial cushion defect. Further observations on internodal conduction and the polarity of the retrograde P wave"@nl . "wetenschappelijk artikel"@nl .